N.Y. Comp. Codes R. & Regs. tit. 1, § 97.5 – Seed standards.

(1) The maximum number of all weed seeds in the certified class of seed shall not exceed 15 seeds per pound of grain in oats or barley, and 10 per pound in rye, spelt, triticale, and wheat.
(2) Weeds considered as objectionable are quackgrass (Elytrigia repens), charlock (wild mustard) (Brassica kaber), and other wild Brassica species; Canada thistle (Cirsium arvense), corn cockle (Agrostemma githago), dodder (Cuscuta spp.), bindweed (Convolvulus arvensis), horsenettle (Solanum carolinense), wild onion (Allium spp.), wild radish (Raphanus raphanistrum), Russian knapweed (Acroptilon repens), bedstraw (Galium spp.) and leafy spurge (Euphorbia esula).
(3) All certified small grain seed shall be free of vetch (Vicia spp.). Certified winter barley and wheat seed shall also be free of rye seeds.
(4) Variations which are typical of the variety shall not be included as other varieties.
(5) Fatuoid oats will be scored as pure seed.
(6) In the fluorescence test of oats, the following tolerances for off-types will be permitted. Foundation class – 9 seeds for pound; registered class – 18 seeds per pound; certified class – 36 seeds per pound.

(a) General provisions.


Class of seed
Factor	Foundation	Registered	Certified
Pure seed (minimum)	99.00%	99.00%	99.00%
Inert matter (maximum)	1.00%	1.00%	1.00%
Weed seeds (maximum)	2 per lb.	5 per lb.	0.03%
Objectionable weed seeds	none	none	none
Other crops, excluding other varieties (maximum)	2 per lb.	5 per lb.	10 per lb.
Other small grains of same growing season (maximum)	none	1 per lb.	5 per lb.
Other distinguishable varieties (maximum)	none	2 per lb.	10 per lb.
Germination (minimum):
Wheat, oats, barley, triticale, spelt	80%	85%	85%
Rye	80%	80%	80%

(b) Additional provisions.